Name some software that, has been released in the last 10 years, that is both successful AND 100% open source.
Apache, PHP, Python, FreeBSD, OpenSSL, MySQL, SQLite, zlib, libpng, ICU, Ogg Vorbis, XviD, x264. Just to name a few.
These are the backbones of our current technology. Just because you don't see them, doesn't mean they aren't there.
A version of FreeBSD is basically in every PS 3 & 4. The Linux Kernel is in virtually every Android phone and tablet out there. Apache & PHP run on the majority of the websites on the net.
Without these technologies we would be a decade behind, since even closed source developments like Apple's ecosystem is based on FreeBSD technology, or rely on things like libpng to open pictures.
Simply put, closed development has produced a LOT more useful software in *MODERN* times than open source.
Depends on where you stand. From an end user point of view, commercial software has an incentive to keep things going. From a company point of view, middleware open source has been far more useful.
But hey, don't complain when Skype discloses your private call to the Chinese government.